Police are threatening to refuse to work in regional New South Wales unless an immediate investigation is called into delayed warnings about asbestos and lead in homes across the state.

The state's Police Association is demanding a $100 million commitment to fix the problem after the force revealed last week that asbestos and lead paint had been found in at least 460 police stations, facilities and homes.

Consultants started to uncover the problems in 2008 but officers have only been warned in the past month of the potentially fatal risk of poisoning.

Senior Constable Paul Ireland is one of at least five officers whose families face years of medical tests after their police rental homes were declared high-risk.

It was not until the officer ran a DIY test more than three months ago that he discovered the flaking paint in the house at Walgett, in the state's north-west, contained dangerous amounts of lead.

His young family was forced to wait until yesterday to be moved to another home.

The Police Association branch official and his wife are now anxiously awaiting the results of medical tests for their three-and-a-half-year-old son and 18-month-old daughter.

"The children are obviously in a high-risk category," Constable Ireland said.

"Nothing happens really quickly out here medical-wise. They're not showing any signs of illness, which is the major thing, but it is a very big concern."

He says he is "angry and disappointed" the police force never tested the house and never offered help to reduce the contamination risk once the lead was discovered.

"It's been passed from one section to another section within the properties unit of the NSW Police Force, passing the buck," he said.

"I've been the one that's been vacuuming my house twice, three times a day trying to get up any paint flakes that have come off."